Carrier D2-3466-2 instruction manual 6-10, Code, Description, Fault Cause, Corrective Action

Table 6.3 – List of Fault Codes (Continued)

	Fault
Code	Description	Fault Cause	Corrective Action
OCb	Overcurrent	DC voltage too high.	Check parameters H.006, H.007.
	(at DC braking)
OCd	Overcurrent (at	Overcurrent condition occurred while	See OC fault corrective actions.
	deceleration)	decelerating.	Increase deceleration time (P.002,
		Deceleration time too short.	P.018, P.022).
OF	Overfrequency	Drive has exceeded maximum	Vector: Check parameters Encoder
		allowable output frequency.	PPR (U.001), Motor Poles (U.002),
		Regenerating energy is too high.	Base Frequency (U.003).
		Stability or slip compensation circuit	V/Hz: Check DC bus voltage; increase
		adds frequency reference.	decelerating time. Check values Max
		If H.016 ON, searching current is too	Speed (P.004) / Overfreq. (H.022).
		high. Motor is too small.	Check slip compensation (H.004).
			If H.016 ON, check motor size versus
			Power Module size, recheck setting of
			P.005 (too high).
OH	Drive	Cooling fan failure.	Check ambient temperature, cooling
	overtemperature		fan, minimum clearances around drive.
OL	Motor overload	Excess motor current.	Vector: Check actual/Motor Rated
		V/Hz: Torque boost too high, therm.	Nameplate Amps (U.004)
		overload level too low.	V/Hz: Check actual current/Torque
			Boost (H.003).
			Check that Power Module is sized
			correctly.
			Reduce load on motor (for example, at
			low frequency).
		Excess load on motor, for example, at	Check that Power Module is sized
		too low speeds.	correctly. Reduce load on motor (e.g.,
			at low frequency).
		Loss of phase connection.	Check output lines to the motor.
OPL	Motor output phase	Phase lost between drive and motor.	Check connections and cable of all 3
	loss		phases and motor windings. Replace
			any damaged cable.
OSP	Overspeed	RPM above 130% Maximum Speed	Check Encoder PPR (U.001), Motor
	(Vector only)	(P.004), speed regulator response not	Poles (U.002), Base Frequency
		optimized.	(U.003), Motor Nameplate RPM
			Speed (U.005). Check Reg.
			Proportional (U.012) Integral Gain
			(U.013)
PUc	Missing Power	Bad or disconnected cable between	Check cables between Regulator
	Module ID	Regulator and Power Module.	board and Power Module.
	connector
PUn	Power Module not	Drive parameters have been restored	Power Module must be configured by
	identified	to power-up defaults. Regulator has	Reliance service personnel.
		not been configured to match Power
		Module.
PUo	Drive power	Power Module overloaded.	Check load to Power Module.
	electronic	Too high DC Braking Current	Check Power Module sizing versus
	overload	(H.007) or Torque Boost (H.003).	application. Check DC Braking Current
			value (H.007). Check Torque Boost
			(H.003).
SF	Self-tuning status		See parameter U.009
	(Vector only)

6-10 Carrier VFD Quick Reference